A portion of the population that can be studied in order to make predictions about the entire population is a(n)

Mathematics

2 answers:

cupoosta [38]4 years ago

6 0

The answer is: a sample

Juli2301 [7.4K]4 years ago

4 0

Answer: A sample is a portion of an entire population. Inferential statistics seek to make predictions about a population based on the results observed in a sample of that population. There are two primary types of population samples: random and stratified

Step-by-step explanation:

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Solve the system of equations. \begin{aligned} &-9y+4x - 20=0 \\\\ &-7y+16x-80=0 \end{aligned} −9y+4x−20=0 −7y+16x−80=

bekas [8.4K]

Answer:

(5 , 0)

Step-by-step explanation:

7 * (−9y+4x−20)=0

9 * (−7y+16x−80)=0

-63y + 28x -140 = 0 ......a

-63y + 144x -720 = 0 .....b

b-a: 116x - 580 = 0

116x = 580

x = 5

y = (4x-20)/-9 = 0/-9 = 0

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3 years ago

A hose fills a hot tub at a rate of 4.74 gallons per minute. How many hours will it take to fill a 294-gallon hot tub?

saveliy_v [14]

So the hose can do 4.74 gallons in 1 minute, how many minutes will it take for 294 gallons?

$\bf \begin{array}{ccll}
gallons&minutes\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
4.74&1\\
294&m
\end{array}\implies \cfrac{4.74}{294}=\cfrac{1}{m}\implies m=\cfrac{294\cdot 1}{4.74}
\\\\\\
m\approx 62.0253164556962$

and since there are 60 minutes in 1 hour, how many hours is that?

$\bf \begin{array}{ccll}
hours&minutes\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
1&60\\
h&62.0253164556962
\end{array}\implies \cfrac{1}{h}=\cfrac{60}{62.0253164556962}
\\\\\\
\cfrac{1\cdot 62.0253164556962}{60}\approx h$

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3 years ago

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pochemuha

Answer:

you're answer is, 22

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3 years ago

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to play at a bingo night,there is a $10 cover charge,plus $2 per bingo card .Write a equation for the cost (y) based on the numb

Aleksandr [31]

Y=2x+10

That is the eqasion, 2(it is the cost per card) and multpy be how many cards you want, then add 10 as base fee